The Harbor plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.
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81° on Nov. 11, 1969, the hottest reading for this week of the year since 1912. Next is 79° in 1930.
Harbor’s center stands about 30 ft above sea level. Within three miles the land runs from 0 ft to 1,330 ft, a difference of 1,330 ft: steep hill country. Open water lies within three miles. The highest named summit within 15 miles is Bosley Butte, about 3,390 ft, 11 miles north-northeast.
Under the town center the state geologic map shows Alluvial deposits (sand, gravel, silt), from the Holocene, less than 12,000 years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 8×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Graywacke, mudstone. Age: Late Jurassic to Early Cretaceous, 129 to 153 million years old. About 10 mi of the line.
Sand, gravel, silt. Age: Holocene, less than 12,000 years old. About 2 mi of the line.
Nepheline-syenite, syenite. Age: Late Eocene to Early Oligocene, 31 to 36 million years old. About 0.8 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
Rain that falls on Harbor runs straight into the Pacific Ocean.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Harbor; river miles along the main stem, rounded.
Harbor has a warm-summer Mediterranean climate. Summer afternoons average 69° in July; winter nights fall to about 42° in January. About 78 inches of rain fall in a normal year.
On November 14 Harbor normally reaches 58° and falls to 45°. The record high is 68°, in 1969; the record low 30°, in 1955. The most rain on this date, 2.62 in, fell in 1934.
Normals 1991–2020 and records since 1912 at Brookings, here. NOAA, through RCC-ACIS.
